Memory Device Mapping Table Verification Mechanism
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Solution Overview
Problem
Conventional memory devices, such as solid state disks, often experience errors in data storage operations due to incorrect mapping tables when powered off abnormally, leading to instability and inaccuracies in data storage.
Innovation Solution
A memory device with a control module that includes a storing unit and a guaranteeing unit to determine the correctness of the mapping table and issue an error signal when it is incorrect, ensuring the accuracy and stability of the mapping table by potentially transforming it into a different format for verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the memory device uses an internal mapping table for data storage, then data storage operation is enabled, but the mapping table may become incorrect when powered off abnormally, leading to errors
Solution Approach 1:
The patent applies preliminary action by generating a verification mapping table in advance and storing it in a verification storage unit. Before data storage operations proceed, the mapping table correctness is pre-verified by comparing the original mapping table with the verification mapping table. This prevents incorrect mapping table usage that would occur during abnormal power-off scenarios, thereby resolving the contradiction between enabling data storage operation and ensuring mapping table accuracy.
2Reliability
If the mapping table is verified to ensure accuracy, then reliability is improved, but the complexity of the control module increases
Solution Approach 1:
The patent applies segmentation by dividing the mapping table verification function into separate dedicated components: a verification storage unit for storing the verification mapping table, and a verification unit for performing the comparison. This segmentation isolates the verification functionality from the main data storage control logic, making the overall system more manageable despite the added complexity. The segmented structure allows reliable verification while keeping each component's function clear and focused.
Data Source
AI summary
A memory device includes a memory module and a control module. The control module is coupled to the memory module and is configured to store data into the memory module according to a first mapping table. The control module includes a storing unit and a guaranteeing unit. The storing unit is configured to store the first mapping table. The guaranteeing unit is coupled to the storing unit and is configured to determine whether the first mapping table is correct or not. The guaranteeing unit is further configured to issue an error signal in a state where the first mapping table is incorrect.